Rubbing brick



June 14, 1938. w. L..BURGER RUBBING BRICK Filed June 26, 19 36 INVENTOR. W////a L. fiucyer: BY

ATTOR NEY I .In: I

Patented June 14, 1938 UNITED STATES PATENT OFFICE RUBBING BRICK William L. Burger, Kansas City, Mo.

Application June 26,

5 Claims.

25 such surfaces so that when one surface wears down another surface may be brought into use by changing the location of the handle, thereby providing a brick of longer life and at a reduced ultimate cost to the purchaser.

It is also an important object of the present invention to provide a, simple and secure attachment of a handle whereby the handle is readily removed and relocated on the brick to present a new abrasive surface.

In accomplishing these and other objects of the invention, as hereinafter pointed out, I have provided improved details of structure, the preferred form of which is illustrated in the accompanying drawing, wherein:

Fig. l is a perspective view of .a rubbing brick embodying the features of the present invention.

Fig. 2 is a similar perspective view but illustrating the handle detached from and in spaced relation with the brick.

25 Fig. 3 is a longitudinal section through the brick on the line 33 of Fig. 4, and showing the handle attached.

Fig. 4 is a cross-section on the line 4-4 of Fig. 3.

Referring more in detail to the drawing:

i designates a rubbing brick formed of abrasive materials, vitrified and bonded together in substantially brick shape to provide substantially rectangular abrasive surfaces 2 and 3 on opposite 5 sides thereof and having angularly arranged flutes 4 extending in parallel relation thereacross. The flutes on one face of the brick extend reversely from the flutes on the other face, so that the flutes will extend in the desired angular di- 40 rection when either surface is used for abrasive purposes. The flutes 4 are of sufficient size to collect the liquid used in abrading a surface and to provide relief from. the material abraded therefrom. The flutes on one face of the brick are 5 preferably staggered with the flutes on the other face of the brick, as clearly shown in Figs. 1 and 2, so that the flutes on one side will cross the flutes on the opposite side at the longitudinal median line of the brick.

Formed in the brick and extending through the body thereof, in alignment with the registering points of selective flutes, are pairs of openings 5--6 and 1-8. The pair of openings 5 and 6 are tapered toward one face of the brick, while 55 the other pair of openings 1 and 8 are tapered 1936, Serial No. 87,448

toward the opposite face of the brick, as clearly shown in Fig. 3, whereby one pair of openings is employed in mounting a handle 9 on one face when the other fluted face is used as an abrading surface, and the other pair is used-when the abrading surfaces are reversed. The pairs of openings are located so that they have the same relative spacing from the respective ends of the brick to permit registry with screw openings in the ends of the handles when the handle is reversed as later described. 7

The handle 9 includes an elongated, knob-like, gripping portion [0 and an integral base portion ll having a flat surface l2'contactable with one or the other of the abrading surfaces of the-brick, and which is drawn tightly thereagainst by means of fastening devices, such as wood screws l3 and I4, extending through the pair of openings havingtheir larger diameters at the face of the brick opposite'the-handle, and which are threaded into the handle as illustrated at l5 and win Figs. 3 and 4. The heads I! and I8 of the screws pass freely through the larger ends I9 and 20 of the openings but are drawn toward the constricted ends 2| and 22 of the openings to firmly wedge therein at the approximate center of the brick when the screws are tightened to draw the bearing surface of the handle against the brick. The rubbing brick may then be used until the flutes on the abrading surface opposite the handle have been worn away, after which the fastening devices are removed and the brick reversed with the handle applied to the worn face of the brick by inserting the screws through the other pair of tapered openings.

The base of the handle preferably conforms with the length of the brick but it is of less width than the brick, as shown in Fig. 4.

When the handle is applied to the other side of the brick, the ends thereof are reversed from what they were on the first side so that the old screw holes in the handle align with the other pair of tapered openings, therefore when the screws are reapplied they enter the same threaded openings in the handle to facilitate application thereof. The new abrading surface of the brick may then be used until the flutes on that side have become worn away, after which the handle may be removed and reapplied to a new brick.

From the foregoing, it is obvious that I have provided a rubbing brick which has substantially twice the life in that it has substantially twice the productive surface of an ordinary brick. It is also obvious that when both sides of the brick have become worn the handle may be disconnected and reapplied to a new brick without making it necessary to purchase a new handle with every brick.

What I claim and desire to secure by Letters Patent is:

l. A rubbing brick having fluted abrasive surfaces on opposite faces thereof and having pairs of openings extending through the brick from the respective faces and having screw head engaging portions located substantially midway of the thickness of the brick, and fastening devices engageable in selected pairs of openings and having heads engaging said head engaging portions to secure a handle to a selected faceof the brick whereby the handle is adapted to be removed and applied to the opposite face when the fluted surface on that face is worn, using the same fastening devices in said other pair of openings.

2. A rubbing brick having fluted abrasive surfaces on opposite faces thereof and having pairs of tapered openings extending through the brick from the respective faces thereof, and fastening devices having heads engageable in a selected pair of openings at points substantially midway of the thickness of the brick to secure a handle to the face of the brick on the constricted side of said selected pair of tapered openings, whereby the handle is adapted to be removed and applied to the opposite face when the fluted surface on that face is worn, using the same fastening devices in said other pair of openings.

3. A rubbing brick having fluted abrasive surfaces on opposite faces thereof and having pairs of openings extending through the brick from the respective faces and having screw head engaging portions located substantially midway of the thickness of the brick, one pair of openings having the same relative spacing from one end of the brick from that of the other pair from the opposite end of the brick, and fastening devices engageable in a selected pair of openings and having heads engaging said head engaging portions to secure a handle to a selected face of the brick, whereby the handle is adapted to be removed and applied to the opposite face when the fluted surface on that face is worn, using the same fastening devices in said other pair of openings.

4. A rubbing brick having fluted abrasive surfaces on opposite faces thereof and having pairs of tapered openings extending through the brick from the respective faces thereof, one pair of openings having the same relative spacing from one end of the brick as that of the other pair from the opposite end of the brick, and fastening devices having heads engageable in a selected pair of openings at points substantially midway of the thickness of the brick to secure a handle to the face of the brick on the constricted side of said tapered openings whereby the handle is adapted to be removed and applied to the opposite face when the fluted surface on that face is worn, using the same fastening devices in said other pair of openings.

5. A rubbing brick having abrasive surfaces on opposite sides thereof and provided with flutes extending angularly across the brick with the flutes in one face intersecting a plane extending through the longitudinal median line of the brick in aligning registry with the intersection of the flutes in the opposite side of the brick with said plane, said brick having pairs of openings extending through the brick from the respective faces and having head engaging portions located substantially midway of the thickness of the brick, and fastening devices engageable in selected pairs of openings and having heads engaging said head engaging portions to secure a handle to a selected face of the brick, whereby the handle is adapted to be removed and applied to the opposite face when the fluted surface on that face is worn, using the same fastening devices in said other pair of openings.

WILLIAM L. BURGER. 

